Well, OC v.1.5.6.x works perfect up to PH 7.0.xx, just not with PHP 7.1.xx, so there
is not need tp move up in OC Versions, just because of that. Exept for the OC Install
Routine itself, it needs to be reworked, to still function with a PHP 7.0.x install.
But performance-wise, I have never experienced any increase in performance, by
changing to PHP-7, just to mention this.
Ernie

Well, some drive their old Car's, as long as they do their Job well. I'm also still
in Love with my XP's, and I see not one good reason, to learn, how to handle
latest Win Versions, to just end up, basically doing exactly the same as before,
just in a completely new and strange looking surrounding, and by use of unfamiliar
new tools.

And as long as 'real' security-related problems can be fixed, and/or Layouts adapted
to meet latest User-Demands, there is no good reason, to change existing Software,
before it's beeing required by a Hoster Setup Change. New does not automatically
mean better, faster, or safer, as History proves.
Ernie